Question on getting started

So I am trying to gather data on creating my own 2600 cartridges. Later on down the road i want to get into programming games but for now I just want to practice creating carts. What I have gathered is that I need an eprom programmer and some eproms (i already bought some 2732's). I then download the rom of the atari game that I want and burn it onto the eprom. I then desolder the old atari chip and then solder the new 2732 eprom in its place. My question is, is that it? it sounds straightforward and simple but I feel like it shouldn't be. Sorry for the noob question but I've been searching around for a few weeks trying to figure this all out. Thank you in advance.